This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A049714 #8 Aug 07 2021 00:19:38
%S A049714 1,3,12,19,43,60,114,138,225,271,408,462,641,728,982,1087,1407,1542,
%T A049714 1948,2115,2625,2805,3420,3646,4343,4624,5464,5783,6735,7100,8220,
%U A049714 8614,9863,10345,11756,12249,13833,14413,16158,16814
%N A049714 a(n) = Sum_{i=0..floor(n/2)} T(2i,n-2i), array T as in A048149.
%K A049714 nonn
%O A049714 0,2
%A A049714 _Clark Kimberling_